Add Metal LB addon

cmd/minikube/cmd/config/configure.go

@@ -18,8 +18,10 @@ package config
 
 import (
 	"io/ioutil"
+	"net"
 
 	"github.com/spf13/cobra"
+	"k8s.io/minikube/pkg/minikube/config"
 	"k8s.io/minikube/pkg/minikube/exit"
 	"k8s.io/minikube/pkg/minikube/out"
 	"k8s.io/minikube/pkg/minikube/service"
@@ -178,6 +180,30 @@ var addonsConfigureCmd = &cobra.Command{
 				out.WarningT("ERROR creating `registry-creds-acr` secret")
 			}
 
+		case "metallb":
+			profile := ClusterFlagValue()
+			cfg, err := config.Load(profile)
+			if err != nil {
+				out.ErrT(out.FatalType, "Failed to load config {{.profile}}", out.V{"profile": profile})
+			}
+
+			validator := func(s string) bool {
+				return net.ParseIP(s) != nil
+			}
+
+			if cfg.KubernetesConfig.LoadBalancerStartIP == "" {
+				cfg.KubernetesConfig.LoadBalancerStartIP = AskForStaticValidatedValue("-- Enter Load Balancer Start IP: ", validator)
+			}
+
+			if cfg.KubernetesConfig.LoadBalancerEndIP == "" {
+				cfg.KubernetesConfig.LoadBalancerEndIP = AskForStaticValidatedValue("-- Enter Load Balancer End IP: ", validator)
+			}
+
+			err = config.SaveProfile(profile, cfg)
+			if err != nil {
+				out.ErrT(out.FatalType, "Failed to save config {{.profile}}", out.V{"profile": profile})
+			}
+
 		default:
 			out.FailureT("{{.name}} has no available configuration options", out.V{"name": addon})
 			return

cmd/minikube/cmd/config/prompt.go

@@ -153,3 +153,23 @@ func posString(slice []string, element string) int {
 func containsString(slice []string, element string) bool {
 	return posString(slice, element) != -1
 }
+
+// AskForStaticValidatedValue asks for a single value to enter and check for valid input
+func AskForStaticValidatedValue(s string, validator func(s string) bool) string {
+	reader := bufio.NewReader(os.Stdin)
+
+	for {
+		response := getStaticValue(reader, s)
+
+		// Can't have zero length
+		if len(response) == 0 {
+			out.Err("--Error, please enter a value:")
+			continue
+		}
+		if !validator(response) {
+			out.Err("--Invalid input, please enter a value:")
+			continue
+		}
+		return response
+	}
+}

deploy/addons/metallb/metallb-config.yaml.tmpl

@@ -0,0 +1,12 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  namespace: metallb-system
+  name: config
+data:
+  config: |
+    address-pools:
+    - name: default
+      protocol: layer2
+      addresses:
+      - {{ .LoadBalancerStartIP }}-{{ .LoadBalancerEndIP }}

deploy/addons/metallb/metallb.yaml

@@ -0,0 +1,293 @@
+apiVersion: v1
+kind: Namespace
+metadata:
+  labels:
+    app: metallb
+  name: metallb-system
+---
+apiVersion: policy/v1beta1
+kind: PodSecurityPolicy
+metadata:
+  labels:
+    app: metallb
+  name: speaker
+  namespace: metallb-system
+spec:
+  allowPrivilegeEscalation: false
+  allowedCapabilities:
+  - NET_ADMIN
+  - NET_RAW
+  - SYS_ADMIN
+  fsGroup:
+    rule: RunAsAny
+  hostNetwork: true
+  hostPorts:
+  - max: 7472
+    min: 7472
+  privileged: true
+  runAsUser:
+    rule: RunAsAny
+  seLinux:
+    rule: RunAsAny
+  supplementalGroups:
+    rule: RunAsAny
+  volumes:
+  - '*'
+---
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  labels:
+    app: metallb
+  name: controller
+  namespace: metallb-system
+---
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  labels:
+    app: metallb
+  name: speaker
+  namespace: metallb-system
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  labels:
+    app: metallb
+  name: metallb-system:controller
+rules:
+- apiGroups:
+  - ''
+  resources:
+  - services
+  verbs:
+  - get
+  - list
+  - watch
+  - update
+- apiGroups:
+  - ''
+  resources:
+  - services/status
+  verbs:
+  - update
+- apiGroups:
+  - ''
+  resources:
+  - events
+  verbs:
+  - create
+  - patch
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  labels:
+    app: metallb
+  name: metallb-system:speaker
+rules:
+- apiGroups:
+  - ''
+  resources:
+  - services
+  - endpoints
+  - nodes
+  verbs:
+  - get
+  - list
+  - watch
+- apiGroups:
+  - ''
+  resources:
+  - events
+  verbs:
+  - create
+  - patch
+- apiGroups:
+  - extensions
+  resourceNames:
+  - speaker
+  resources:
+  - podsecuritypolicies
+  verbs:
+  - use
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: Role
+metadata:
+  labels:
+    app: metallb
+  name: config-watcher
+  namespace: metallb-system
+rules:
+- apiGroups:
+  - ''
+  resources:
+  - configmaps
+  verbs:
+  - get
+  - list
+  - watch
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  labels:
+    app: metallb
+  name: metallb-system:controller
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: metallb-system:controller
+subjects:
+- kind: ServiceAccount
+  name: controller
+  namespace: metallb-system
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  labels:
+    app: metallb
+  name: metallb-system:speaker
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: metallb-system:speaker
+subjects:
+- kind: ServiceAccount
+  name: speaker
+  namespace: metallb-system
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: RoleBinding
+metadata:
+  labels:
+    app: metallb
+  name: config-watcher
+  namespace: metallb-system
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: Role
+  name: config-watcher
+subjects:
+- kind: ServiceAccount
+  name: controller
+- kind: ServiceAccount
+  name: speaker
+---
+apiVersion: apps/v1
+kind: DaemonSet
+metadata:
+  labels:
+    app: metallb
+    component: speaker
+  name: speaker
+  namespace: metallb-system
+spec:
+  selector:
+    matchLabels:
+      app: metallb
+      component: speaker
+  template:
+    metadata:
+      annotations:
+        prometheus.io/port: '7472'
+        prometheus.io/scrape: 'true'
+      labels:
+        app: metallb
+        component: speaker
+    spec:
+      containers:
+      - args:
+        - --port=7472
+        - --config=config
+        env:
+        - name: METALLB_NODE_NAME
+          valueFrom:
+            fieldRef:
+              fieldPath: spec.nodeName
+        - name: METALLB_HOST
+          valueFrom:
+            fieldRef:
+              fieldPath: status.hostIP
+        image: metallb/speaker:v0.8.2
+        imagePullPolicy: IfNotPresent
+        name: speaker
+        ports:
+        - containerPort: 7472
+          name: monitoring
+        resources:
+          limits:
+            cpu: 100m
+            memory: 100Mi
+        securityContext:
+          allowPrivilegeEscalation: false
+          capabilities:
+            add:
+            - NET_ADMIN
+            - NET_RAW
+            - SYS_ADMIN
+            drop:
+            - ALL
+          readOnlyRootFilesystem: true
+      hostNetwork: true
+      nodeSelector:
+        beta.kubernetes.io/os: linux
+      serviceAccountName: speaker
+      terminationGracePeriodSeconds: 0
+      tolerations:
+      - effect: NoSchedule
+        key: node-role.kubernetes.io/master
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  labels:
+    app: metallb
+    component: controller
+  name: controller
+  namespace: metallb-system
+spec:
+  revisionHistoryLimit: 3
+  selector:
+    matchLabels:
+      app: metallb
+      component: controller
+  template:
+    metadata:
+      annotations:
+        prometheus.io/port: '7472'
+        prometheus.io/scrape: 'true'
+      labels:
+        app: metallb
+        component: controller
+    spec:
+      containers:
+      - args:
+        - --port=7472
+        - --config=config
+        image: metallb/controller:v0.8.2
+        imagePullPolicy: IfNotPresent
+        name: controller
+        ports:
+        - containerPort: 7472
+          name: monitoring
+        resources:
+          limits:
+            cpu: 100m
+            memory: 100Mi
+        securityContext:
+          allowPrivilegeEscalation: false
+          capabilities:
+            drop:
+            - all
+          readOnlyRootFilesystem: true
+      nodeSelector:
+        beta.kubernetes.io/os: linux
+      securityContext:
+        runAsNonRoot: true
+        runAsUser: 65534
+      serviceAccountName: controller
+      terminationGracePeriodSeconds: 0

pkg/addons/config.go

@@ -129,4 +129,9 @@ var Addons = []*Addon{
 		set:       SetBool,
 		callbacks: []setFn{enableOrDisableStorageClasses},
 	},
+	{
+		name:      "metallb",
+		set:       SetBool,
+		callbacks: []setFn{enableOrDisableAddon},
+	},
 }